CN102118039A - Balanced charging system, charging module, charger and charging method of battery pack - Google Patents
Balanced charging system, charging module, charger and charging method of battery pack Download PDFInfo
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- CN102118039A CN102118039A CN2009102152826A CN200910215282A CN102118039A CN 102118039 A CN102118039 A CN 102118039A CN 2009102152826 A CN2009102152826 A CN 2009102152826A CN 200910215282 A CN200910215282 A CN 200910215282A CN 102118039 A CN102118039 A CN 102118039A
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Abstract
The invention provides a balanced charging system, a charging module, a charger and a charging method of a battery pack. The balanced charging system comprises the charging module and the charger. The charging module comprises the charger and the battery pack, wherein the battery pack comprises a plurality of batteries which are serially connected together. The charging method comprises the following steps: charging with heavy current serially, detecting the voltage or capacity of each battery, and charging with low current independently when the voltage or capacity of one battery reaches a reset value. The balanced charging system has the efficacy of balanced charging.
Description
Technical field
The present invention relates to a kind of equilibrium charging system, charging module, charging device and charging method of battery pack, but particularly relate to a kind of equilibrium charging system, charging module, charging device and charging method of battery pack of equilibrium charging.
Background technology
Usually, when battery (for example lithium battery) is applied to for example electric tool or electric motor car, a plurality of batteries of need connecting simultaneously are to provide higher voltage.When the battery pack of forming when a plurality of battery was charged, if wherein a certain battery overcharges, then the easy damage of battery also can produce the risk that a large amount of heat has blast; If a certain battery charge deficiency wherein, then influence the electric weight of overall cell group easily.Moreover after battery used a special time, the voltage of each battery in the series battery, impedance meeting produced variation, thereby cause the voltage of each battery and capability value to have difference and unbalanced problem, reduce battery life.
Now, the charging modes of general battery pack is to adopt, and promptly stops the mode of charging when wherein arbitrary battery of battery pack arrives pre-determined upper voltage limit, to prevent to overcharge the danger of blast.Yet above-mentioned charging modes, and the electric weight of each battery of balance simultaneously make the otherness of each battery in the battery pack, continual accumulation under cycle charge-discharge repeatedly, and the whole charged ability that causes being connected in series battery descends fast.
Summary of the invention
One of purpose of the present invention is to provide a kind of battery pack charging device, and in order to battery pack is charged, wherein said battery pack is to be composed in series by several batteries, it is characterized in that described battery pack charging device comprises:
Power distribution unit is electrically connected at described battery, and wherein when wherein one the voltage of described battery or capacity arrived preset value, described power distribution unit was to produce several low current power supplies according to detection signal;
Switch, be electrically connected at charge power supply, described battery pack and described power distribution unit, when carrying out the charging of described battery pack, described switch is to switch described charge power supply to described battery pack, when described power distribution unit receives described detection signal, described switch switches described charge power supply to described power distribution unit, to produce described low current power supply; And
Several charging control unit are electrically connected between described power distribution unit and the described battery, and wherein said low current power supply is respectively described battery to charge via described charging control unit.
Two of purpose of the present invention is to provide a kind of battery charging module, it is characterized in that described battery charging module comprises:
Battery pack, it is composed in series by several batteries; And
Battery pack charging device, in order to described battery pack is charged, wherein battery pack charging device comprises:
Power distribution unit is electrically connected at described battery, and wherein when wherein one the voltage of described battery or capacity arrived preset value, described power distribution unit was to produce several low current power supplies according to detection signal;
Switch, be electrically connected at charge power supply, described battery pack and described power distribution unit, when carrying out the charging of described battery pack, described switch is to switch described charge power supply to described battery pack, when described power distribution unit receives described detection signal, described switch switches described charge power supply to described power distribution unit, to produce described low current power supply; And
Several charging control unit are electrically connected between described power distribution unit and the described battery, and wherein said low current power supply is respectively described battery to charge via described charging control unit.
Three of purpose of the present invention is to provide a kind of battery pack equilibrium charging system, it is characterized in that described battery pack equilibrium charging system comprises:
Charger; And
Battery charging module, in order to be electrically connected at described charger, wherein said battery charging module comprises:
Battery pack, it is composed in series by several batteries; And
Battery pack charging device, in order to described battery pack is charged, wherein battery pack charging device comprises:
Power distribution unit is electrically connected at described battery, and wherein when wherein one the voltage of described battery or capacity arrived preset value, described power distribution unit was to produce several low current power supplies according to detection signal;
Switch, be electrically connected at charge power supply, described battery pack and described power distribution unit, when carrying out the charging of described battery pack, described switch is to switch described charge power supply to described battery pack, when described power distribution unit receives described detection signal, described switch switches described charge power supply to described power distribution unit, to produce described low current power supply; And
Several charging control unit are electrically connected between described power distribution unit and the described battery, and wherein said low current power supply is respectively described battery to charge via described charging control unit.
Four of purpose of the present invention is to provide a kind of method for charging battery pack, and in order to battery pack is charged, wherein said battery pack is to be composed in series by several batteries, it is characterized in that said method comprising the steps of:
Provide charge power supply to described battery pack to carry out big electric current serial connection charge;
Detect the voltage or the charging capacity of each described battery; And
When wherein one the voltage of described battery or capacity arrive preset value, provide several low current power supplies to described battery, to carry out a little electric current charge independence, wherein said little electric current charge independence is individually each described battery to be charged.
Equilibrium charging system, charging module, charging device and the charging method of battery pack of the present invention can have the effect of charging balance, to avoid over-charging of battery or not enough problem.And the circuit framework of battery pack charging device of the present invention is quite simple and easy, and can significantly save cost.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 shows the system's block schematic diagram according to the battery pack equilibrium charging system of one embodiment of the invention;
Fig. 2 shows the method flow diagram according to the method for charging battery pack of one embodiment of the invention;
Fig. 3 shows the system's block schematic diagram according to the battery pack equilibrium charging system of another embodiment of one embodiment of the invention;
Fig. 4 shows the system's block schematic diagram according to the battery pack equilibrium charging system of another embodiment of the present invention; And
Fig. 5 shows the system's block schematic diagram according to the battery pack equilibrium charging system of another embodiment of the present invention.
Embodiment
Below the explanation of each embodiment be with reference to additional graphic, can be in order to illustration the present invention in order to the specific embodiment of implementing.The direction term that the present invention mentioned, for example " on ", D score, " preceding ", " back ", " left side ", " right side ", " interior ", " outward ", " side " etc., only be direction with reference to annexed drawings.Therefore, the direction term of use is in order to explanation and understands the present invention, but not in order to restriction the present invention.
In following examples, in different figure, same section is to represent with same numeral.
Please refer to Fig. 1, it illustrates the system's block schematic diagram according to the battery pack equilibrium charging system of one embodiment of the invention.The battery pack equilibrium charging system 100 of present embodiment can comprise battery charging module 101 and charger 102, and charger 102 can provide a charge power supply to battery charging module 101, charges.Battery charging module 101 comprises battery pack charging device 110 and battery pack 120, and battery pack charging device 110 is in order to the charge power supply of reception charger 102, comes battery pack 120 is charged, and wherein battery pack 120 is to be composed in series by several batteries 121.Charger 102 is a lithium battery charger for example, and the battery 121 of battery pack 120 for example is a lithium battery.Battery pack equilibrium charging system 100, battery charging module 101 and the battery pack charging device 110 of present embodiment can reach the effect of equilibrium charging, and it is full also can to make that each battery 121 of battery pack 120 fills fully, and do not have the problem that overcharges.
As shown in Figure 1, the battery pack charging device 110 of the battery charging module 101 of present embodiment can be integrated on the circuit board (not illustrating), and battery pack charging device 110 comprises battery detecting unit 111, power distribution unit 112, switch 113, several charging control unit 114 and charging connector 115.Battery detecting unit 111 is the batteries 121 that are electrically connected at battery pack 120, whether arrives a preset value in order to the voltage of detecting battery 121, for example is that the full charging of battery 121 is pressed, that is whether battery detecting unit 111 can fill full in order to detecting battery 121.So be not limited thereto, in other embodiments, this preset value can for example be pressed for the full charging of battery 121 or be filled 90～99% of full capacity, maybe can decide according to actual user demand.When battery detecting unit 111 detects wherein one the voltage of these a little batteries 121 or capacity when arriving preset value, battery detecting unit 111 can send detection signal to power distribution unit 112, notifies wherein one the voltage of battery 121 to arrive preset value (or filling full).In the present embodiment, battery pack charging device 110 can comprise several battery detecting unit 111, and it is connected to corresponding battery 121, with indivedual detecting batteries 121.So be not limited thereto, in other embodiments, battery pack charging device 110 also can be provided with single battery detecting unit 111 and be connected in these batteries 121, arrives preset value so that whether the voltage of battery 121 or capacity are arranged in the detecting battery pack 120.
As shown in Figure 1, the power distribution unit 112 of present embodiment is battery 121 and the switch 113 that is electrically connected at detecting unit 111, battery pack 120.Power distribution unit 112 comprises switch controller 116 and transducer 117.Switch controller 116 is to be electrically connected between detecting unit 111 and the switch 113, in order to the detection signal according to battery detecting unit 111, controls switch 113.Transducer 117 is to be electrically connected between switch 113 and the charging control unit 114, (its electric current for example is 1～1.5A) to become the low current power supply of several independent isolating in order to the charge power supply of changing big electric current, and provide respectively to charging control unit 114, wherein transducer 117 is preferably the transducer of one-to-many form, for example is flyback (Flyback) transducer.
As shown in Figure 1, the switch 113 of present embodiment is to be electrically connected between charging connector 115, battery pack 120 and the power distribution unit 112, in order to switch charge power supply to series connected battery 121 or power distribution unit 112.When beginning to charge, switch 113 is to switch charge power supply to electrically connect battery pack 120, uses that charge power supply is directly charged to series connected battery group 120.When power distribution unit 112 receives detection signal, that is when wherein one the voltage of battery 121 has arrived preset value (or filling full), the switch controller 116 may command switchs 113 of power distribution unit 112, be electrically connected at power distribution unit 112 to switch charge power supply, the charge power supply of using the transducer 117 convertible big electric currents that make power distribution unit 112 becomes this a little low current power supplies, and exports charging control unit 114 respectively to.
As shown in Figure 1, the charging control unit 114 of present embodiment is to be electrically connected between power distribution unit 112 and the battery 121, and is man-to-man connected mode with battery 121 respectively.Charging control unit for example is the charging control IC, and to the control of independently charging of each battery 121, thereby the low current power supply that power distribution unit 112 is produced can independently battery 121 charge via charging control unit 114 respectively in order to respectively.That is after wherein one the voltage of battery 121 or capacity arrived preset value, charging control unit 114 can be carried out man-to-man charging to the battery 121 of all the other no show preset values, uses distinctly to make each battery 121 arrive preset values.The charging connector 115 of present embodiment is in order to the joint 103 that is connected in charger 102, to provide charge power supply to battery 121.
Please refer to Fig. 2, it illustrates the method flow diagram according to the method for charging battery pack of the first embodiment of the present invention.When the battery pack equilibrium charging system 100 that utilizes present embodiment comes battery pack 120 charged, at first, charging connector 115 is connected in the joint 103 of charger 102, carries out big electric current serial connection charge (step S201) so that charge power supply to battery pack 120 to be provided.At this moment, switch 113 is to switch to battery pack 120, uses the charge power supply that charger 102 is provided and can directly charge to series connected battery group 120.Then, detect the voltage or the charging capacity (step S202) of each battery 121.At this moment, whether the voltage that battery 121 can be detected in battery detecting unit 111 arrives a preset value, and sends detection signal and notify power distribution unit 112.Then, when wherein any one voltage or the capacity when arriving preset value that detects battery 121, provide low current power supply to battery 121, to carry out little electric current charge independence (step S203), its medium and small electric current charge independence is individually each battery 121 to be carried out man-to-man charging, up to each battery 121 full charging.At this moment, switch 113 can switch to power distribution unit 112, use and make power distribution unit 112 produce low current power supply, export charging control unit 114 respectively to, charging control unit 114 can individually be carried out one to one each battery 121 and independently charging control, up to individual other battery 121 full chargings, its corresponding charging control unit 114 can stop the charging to battery 121.When each battery 121 of battery pack 120 all during full charging, promptly finish charging to battery pack 120.
Therefore, the battery pack charging device 110 of present embodiment can utilize the charge power supply of big electric current to come series connected battery group 120 is charged earlier, to carry out big electric current serial connection charge apace, and can save the charging interval, voltage or capacity up to the wherein battery 121 of battery pack 120 arrive preset value, promptly switch to little electric current charge independence pattern, use and indivedual independently all the other do not filled full battery 121 and carry out the low current power supply charging.Because each battery 121 of battery pack 120 is individually independently by full charging, be not via the electric current serial connection charge, thereby can avoid battery 121 to have overcharging or the problem of undercharge, reaching the effect of equilibrium charging, and can guarantee the electric weight and the useful life of battery pack 120.
Please refer to Fig. 3, it illustrates the system's block schematic diagram according to the battery pack equilibrium charging system of another embodiment of the present invention.In another embodiment, the battery pack 320 of battery charging module 101 can be provided with overcharge protection circuit 322, overcharges situation in order to the battery 121 of avoiding battery pack 320.When wherein one the voltage of these a little batteries 121 or capacity arrived preset value, overcharge protection circuit 322 can send an over-charge protective signal to power distribution unit 112, to carry out little electric current charge independence.Therefore, this over-charge protective signal can be used as detection signal, notifies power distribution unit 112 to carry out charge mode and switches.
Please refer to Fig. 4, it illustrates the system's block schematic diagram according to the battery pack equilibrium charging system of another embodiment of the present invention.In another embodiment, the battery pack 420 of battery charging module 101 can be provided with battery management system (BMS) 422, in order to the electric weight and the voltage of the battery 121 of monitoring battery group 420, and can transmit battery real time charging information to power distribution unit 112.Therefore, when battery detecting unit 111 detects wherein one the voltage of these a little batteries 121 or capacity when arriving preset value, the battery management system 422 of battery pack 420 can provide battery real time charging information to power distribution unit 112, uses and carries out little electric current charge independence or charge closing function.At this moment, the battery charge information that battery management system 422 is provided can be used as detection signal, notifies power distribution unit 112 to carry out charge mode and switches.
Please refer to Fig. 5, it illustrates the system's block schematic diagram according to the battery pack equilibrium charging system of another embodiment of the present invention.In another embodiment, battery charging module 501 can more comprise charging display unit 530, it is electrically connected at power distribution unit 112, in order to show the charging situation of battery 121, thereby the user can judge the charging situation of battery pack 120, and the display unit 530 that wherein charges for example is display lamp or display.
By the embodiment of the invention described above as can be known, the battery pack charging device and the method for charging battery pack of the battery charging module of battery pack equilibrium charging of the present invention system can be in order to charge to the series connected battery group, and can make each battery full charging, and nothing overcharges or not enough problem, thereby has the effect of charging balance.Moreover the circuit framework of battery pack charging device of the present invention is quite simple and easy, and can significantly save cost.
In sum; though the present invention discloses as above with preferred embodiment; but described preferred embodiment is not in order to restriction the present invention; the those of ordinary skill in described field; without departing from the spirit and scope of the present invention; all can do various changes and retouching, so protection scope of the present invention is as the criterion with the scope that claim defines.
Claims (10)
1. battery pack charging device, in order to battery pack is charged, wherein said battery pack is to be composed in series by several batteries, it is characterized in that described battery pack charging device comprises:
Power distribution unit is electrically connected at described battery, and wherein when wherein one the voltage of described battery or capacity arrived preset value, described power distribution unit was to produce several low current power supplies according to detection signal;
Switch, be electrically connected at charge power supply, described battery pack and described power distribution unit, when carrying out the charging of described battery pack, described switch is to switch described charge power supply to described battery pack, when described power distribution unit receives described detection signal, described switch switches described charge power supply to described power distribution unit, to produce described low current power supply; And
Several charging control unit are electrically connected between described power distribution unit and the described battery, and wherein said low current power supply is respectively described battery to charge via described charging control unit.
2. battery pack charging device according to claim 1 is characterized in that: also comprise the battery detecting unit, in order to voltage or the charging capacity of detecting described battery, and send detection signal to described power distribution unit.
3. battery pack charging device according to claim 1 is characterized in that: described power distribution unit comprises switch controller, and it controls described switch according to described detection signal.
4. battery pack charging device according to claim 1 is characterized in that: described power distribution unit comprises transducer, and it is electrically connected between described switch and the described charging control unit, becomes described low current power supply in order to change described charge power supply.
5. display panels according to claim 1 is characterized in that: also comprise the charging display unit, it is electrically connected at described power distribution unit, in order to show the charging situation of each described battery.
6. battery charging module is characterized in that described battery charging module comprises:
Battery pack, it is composed in series by several batteries; And
Battery pack charging device, in order to described battery pack is charged, wherein battery pack charging device comprises:
Power distribution unit is electrically connected at described battery, and wherein when wherein one the voltage of described battery or capacity arrived a preset value, described power distribution unit was to produce several low current power supplies according to detection signal;
Switch, be electrically connected at charge power supply, described battery pack and described power distribution unit, when carrying out the charging of described battery pack, described switch is to switch described charge power supply to described battery pack, when described power distribution unit receives described detection signal, described switch switches described charge power supply to described power distribution unit, to produce described low current power supply; And
Several charging control unit are electrically connected between described power distribution unit and the described battery, and wherein said low current power supply is respectively described battery to charge via described charging control unit.
7. battery charging module according to claim 6 is characterized in that: described battery pack is provided with overcharge protection circuit, and described detection signal is the over-charge protective signal of described overcharge protection circuit.
8. battery charging module according to claim 6 is characterized in that: described battery pack is provided with battery management system, and described detection signal is battery charge information that described battery management system provided.
9. battery pack equilibrium charging system is characterized in that described battery pack equilibrium charging system comprises:
Charger; And
Battery charging module, in order to be electrically connected at described charger, wherein said battery charging module comprises:
Battery pack, it is composed in series by several batteries; And
Battery pack charging device, in order to described battery pack is charged, wherein battery pack charging device comprises:
Power distribution unit is electrically connected at described battery, and wherein when wherein one the voltage of described battery or capacity arrived a preset value, described power distribution unit was to produce several low current power supplies according to detection signal;
Switch, be electrically connected at charge power supply, described battery pack and described power distribution unit, when carrying out the charging of described battery pack, described switch is to switch described charge power supply to described battery pack, when described power distribution unit receives described detection signal, described switch switches described charge power supply to described power distribution unit, to produce described low current power supply; And
Several charging control unit are electrically connected between described power distribution unit and the described battery, and wherein said low current power supply is respectively described battery to charge via described charging control unit.
10. method for charging battery pack, in order to battery pack is charged, wherein said battery pack is to be composed in series by several batteries, it is characterized in that said method comprising the steps of:
Provide charge power supply to described battery pack to carry out big electric current serial connection charge;
Detect the voltage or the charging capacity of each described battery; And
When wherein one the voltage of described battery or capacity arrive preset value, provide several low current power supplies to described battery, to carry out little electric current charge independence, wherein said little electric current charge independence is individually each described battery to be charged.
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| CN2009102152826A CN102118039A (en) | 2009-12-30 | 2009-12-30 | Balanced charging system, charging module, charger and charging method of battery pack |
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| CN2009102152826A CN102118039A (en) | 2009-12-30 | 2009-12-30 | Balanced charging system, charging module, charger and charging method of battery pack |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101938158A (en) * | 2010-09-20 | 2011-01-05 | 江苏万力电池股份有限公司 | Equalizing charge method of lithium ion battery for electric vehicle |
| CN103296324A (en) * | 2013-06-03 | 2013-09-11 | 清华大学 | Vehicle power battery pack charging method |
| CN105914806A (en) * | 2015-03-16 | 2016-08-31 | 中国新能源汽车有限公司 | Battery pack, battery charging station, and charging method |
| CN106786816A (en) * | 2015-11-19 | 2017-05-31 | 低碳动能开发股份有限公司 | Active balancing charging apparatus |
| US10144304B2 (en) | 2015-03-16 | 2018-12-04 | Thunder Power New Energy Vehicle Development Company Limited | Power management in electric vehicles |
| WO2019033629A1 (en) * | 2017-08-17 | 2019-02-21 | 常州市派腾电子技术服务有限公司 | Charging control circuit, battery device, and electronic cigarette |
| CN110401240A (en) * | 2019-06-28 | 2019-11-01 | 联想(北京)有限公司 | Method of supplying power to and electronic equipment |
| US10744845B2 (en) | 2015-03-16 | 2020-08-18 | Thunder Power New Energy Vehicle Development Company Limited | Battery pack, battery charging station, and charging method |
| CN112202221A (en) * | 2020-09-28 | 2021-01-08 | 天津津航计算技术研究所 | Battery equalization circuit and method based on bridgeless isolation type current correction technology |
| CN113472031A (en) * | 2021-06-21 | 2021-10-01 | 天津津航计算技术研究所 | Charging management method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101938158A (en) * | 2010-09-20 | 2011-01-05 | 江苏万力电池股份有限公司 | Equalizing charge method of lithium ion battery for electric vehicle |
| CN103296324A (en) * | 2013-06-03 | 2013-09-11 | 清华大学 | Vehicle power battery pack charging method |
| CN103296324B (en) * | 2013-06-03 | 2015-05-20 | 清华大学 | Vehicle power battery pack charging method |
| US10703211B2 (en) | 2015-03-16 | 2020-07-07 | Thunder Power New Energy Vehicle Development Company Limited | Battery pack, battery charging station, and charging method |
| CN105914806A (en) * | 2015-03-16 | 2016-08-31 | 中国新能源汽车有限公司 | Battery pack, battery charging station, and charging method |
| US10144304B2 (en) | 2015-03-16 | 2018-12-04 | Thunder Power New Energy Vehicle Development Company Limited | Power management in electric vehicles |
| US10744845B2 (en) | 2015-03-16 | 2020-08-18 | Thunder Power New Energy Vehicle Development Company Limited | Battery pack, battery charging station, and charging method |
| US10227010B2 (en) | 2015-03-16 | 2019-03-12 | Thunder Power New Energy Vehicle Development Company Limited | Power management in electric vehicles |
| CN105914806B (en) * | 2015-03-16 | 2019-06-07 | 赣州昶洧新能源汽车有限公司 | Battery pack, Battery Charging Station and charging method |
| CN106786816A (en) * | 2015-11-19 | 2017-05-31 | 低碳动能开发股份有限公司 | Active balancing charging apparatus |
| WO2019033629A1 (en) * | 2017-08-17 | 2019-02-21 | 常州市派腾电子技术服务有限公司 | Charging control circuit, battery device, and electronic cigarette |
| CN110401240A (en) * | 2019-06-28 | 2019-11-01 | 联想(北京)有限公司 | Method of supplying power to and electronic equipment |
| CN110401240B (en) * | 2019-06-28 | 2022-06-28 | 联想(北京)有限公司 | Power supply method and electronic equipment |
| CN112202221A (en) * | 2020-09-28 | 2021-01-08 | 天津津航计算技术研究所 | Battery equalization circuit and method based on bridgeless isolation type current correction technology |
| CN112202221B (en) * | 2020-09-28 | 2024-06-07 | 天津津航计算技术研究所 | Battery equalization circuit and method based on bridgeless isolation type current correction technology |
| CN113472031A (en) * | 2021-06-21 | 2021-10-01 | 天津津航计算技术研究所 | Charging management method and device |
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Application publication date: 20110706 |